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LM86 Datasheet(PDF) 14 Page - Texas Instruments |
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LM86 Datasheet(HTML) 14 Page - Texas Instruments |
14 / 34 page LM86 SNIS114E – DECEMBER 2001 – REVISED MARCH 2013 www.ti.com SMBus Timing Diagrams Figure 8. (a) Serial Bus Write to the internal Command Register followed by a the Data Byte Figure 9. (b) Serial Bus Write to the Internal Command Register Figure 10. (c) Serial Bus Read from a Register with the Internal Command Register preset to desired value SERIAL INTERFACE RESET In the event that the SMBus Master is RESET while the LM86 is transmitting on the SMBData line, the LM86 must be returned to a known state in the communication protocol. This may be done in one of two ways: 1. When SMBData is LOW, the LM86 SMBus state machine resets to the SMBus idle state if either SMBData or SMBCLK are held low for more than 35ms (tTIMEOUT). Note that according to SMBus specification 2.0 all devices are to timeout when either the SMBCLK or SMBData lines are held low for 25-35ms. Therefore, to insure a timeout of all devices on the bus the SMBCLK or SMBData lines must be held low for at least 35ms. 2. When SMBData is HIGH, have the master initiate an SMBus start. The LM86 will respond properly to an SMBus start condition at any point during the communication. After the start the LM86 will expect an SMBus address byte. 14 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LM86 |
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Similar Description - LM86_15 |
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